Metal-spinning apparatus



Sept- 10, 1929 R. G. NELSON I METAL SPINNING APPARATUS 5 Sheets-Sheet 1 Filed June 2O 1929 Sept. l0, 1929.

R. G. NELsoN METAL SPINNING APPARATUS Filed June 20, 1928 5 Sheets-Sheet 2 IJ -A Sept. l0, 1929. R. G. NELSON METAL SPINNING APPARATUS 5 Sheets-Sheet 5 FiledJune 2o, 1928 I gvwentoz 'f2 GYM/Jol;

Sept. l0, 1929. 1,728,002

R. G. NELSON METAL SPINNING APPARATUS Filed June 20, 1928 5 Sheets-Sheet 4 R @Ne/m11 Sept. l0, 1929. R. G. NELSON METAL SPINNING APPARATUS Filed June 20, 1928 5 Sheets-Sheet 5 Fig i4 Patented Sept. l0, 1929.

UNITED STATES yPATENT OFFICE.

REYNOLD G. NELSON, F PONTIAC, MICHIGAN, ASSIGNOR T0 THE SPUN STEEL COR- PORATION, 0F CANTON, OHIO, A CORPORATION OF OHIO.

METAL-SPINNING APPARATUS.

Original application filed September 16, 1926, Serial No. 135852. Divided and this applicationled June 20, 1928. Serial No. 286,980.

My invention relates to apparatus for making by roller spinning as from blank disks of sheet or strip metal, articles of manufacture vhaving a. Wheel disk and one or more relatively narrow and relatively deep annular grooved flanges integral with the Wheel disk, such as V pulleys, and the like, and this application is a division of my prior application, filed September 16, 1926, Serial No. 135,852, matured in Patent No. 1,680,061,

August 7 1928, for spun metal manufacture and product,

Pulleys having peripheral flanges containing one o1' more relatively narrow and relatively deep annular grooves therein such as V grooves, have heretofore been made by first casting a rough V pulley Wheel and then machineifinishing the grooves and other parts thereof. Such cast and machined pulleys require a relatively long time for their production', and a relatively excessive Weight of material, and are very diiiicult to balance dynamically.

. Metal spinning manufacture has heretofore been principally directed to the spinning of articles such as kitchen utensils and the like from the lighter gauges, as 16 gauge and thinner, of sheets or strips of the soft metals such' as brass, aluminum, and the like.

In a. companion application filed Septem- Vber 9, 1926, Serial No. 134,432 matured in Patent No. 1,671,994, June 5, 1928, for metal spinning apparatus, I disclose apparatus for spinning from the heavier gauges,I as 16 gauge and thicker and including quarter inch thick sheets or strips, not only of the soft metals such as brass, aluminum, and the like, but also of steel, articles ofmanufacture such as crown pulleys having tubular por.

ticles by the use of relatively expensive dies 1n punch presses, draw presses, and the like.

The metal spinning apparatus of my aforesaid companion application is not however conveniently and immediately adaptable for the splnning of V pulleys as herein set forth.

Accordingly the objects of the present improvements are:

First, to provide apparatus for making an integral roller spun metal V grooved pulley as aforesaid, preferably spun from the heavier gauges, as 16 gauge and thicker and including quarter inch thick sheets or strips, not only of the soft metals such as brass, aluminum and the like, but also of steel, the roller spun metal V grooved pulley being completely' finished, and substantially vdynamically balanced;

Second, to provide improvements for the metal spinning apparatus of my companion application as aforesaid for adapting the same for completely roller spinning, finishing, and substantially dynamically balancing a V pulley or the like during a continuous rotation of the spinning arbor of the improved apparatus;

Third, to provide improved control and operating means for the improved metal spinning apparatus as aforesaid;

Fourth, to provide improved metal spinning apparatus enabling production of articles of manufacture such as V pulleys as aforesaid in small quantities at a cost less than the cost of making such articles by the use of relatively expensive dies in punch presses, draw presses, and the like;

Fifth, to provide apparatus for carrying out my improved method of roller spinning, which includesrotating material to be spun, applying radial pressure to the rotating ma terial, and applying an axially directed thrust to the rotating material during the application of the radial pressure; and

Sixth, to provide an improved apparatus for carrying out the improved roller spinning method as aforesaid, and which apparatus preferably includes an air cylinder or the like and a cooperating piston for ap- 100 plying the axially directed thrust to the-roi tating material. v

These and ancillary objects are attained in the present improvements by a construction andv arrangement which may be described in general terms as including a bed having operatively mounted thereon an 1mproved spinning headstock provided wlth a spindle drive shaft journalled in roller bearings for resisting thrust and axial loads, as set forth in my companion application, the spindle shaft being adapted to receive and rotate an improved spinning arbor herein set forth in detail, and being an improvement of the spinning arbor disclosed in my companion application, and having an improved sliding spinning form and thrust sleeve thereon, and the bed alsohaving operatively mounted thereon an improved tailstock including improved means such as a compressed air cylinder and piston for operating an improved pulley forming thrust -head 1n cooperation with the spinning arbor, togetherv with aturret tool holder for a plurality of rotary spinning tools all 'mounted on ball or roller bearings as set forth 1n my companion application. v

A preferred embodiment of ,the invention is illustrated in the 'accompanying drawings `forming part hereof inwhich Figure 1 is a fragmentary side elevationof the improved-metal spinning apparatus, the turret tool holder being '-removed;

Fig. 2,.an enlarged fragmentary plan view thereof, the turret tool holder being inplace, and the apparatus being set up for starting the spinning, finishing, and substantially dynamically balancing of a V pulleylcom-v plete from a blank disk during a continuous rotation of the spinning arbor by Athe use of the various tools in the turret toolholder;

Fig. 3, a detached fragmentary plan view,

' with portions in section, of the improved arbor and tailstockthrust head, ready for a thrusting movement axial of the arbor of the thrusting head;

Fig 4, a similar view at the-completion ofthe roller spi/nning'operations of the -rst spinning tool;f i

Fig. 5, a similar view at the completiony of the roller spinning operation of the finishing spinning tool; Fig. 6, a sectional view of the Fig. 7, a detached fragmentary plan viewvv ofthe improvedfarbor and the sleeve sliding lever therefor;

Figs. 8, 9, 10, 11, 12,-and 13, transverse vertical cross-sections of various forms ofv V pulleys embodying-the present invention and made by utilizing the improvements in pulley manufacture herein set/forth; and

Fig. l14, a detached enlarged fragmentary plan view of the apparatus provided with a modified form of vthrust head.

arbor as on Similar numerals refer to similar part-s vthroughout the drawings.

The improved metal' spinning apparatus indicated generally at l includes a bed. 2 supported-by suitable legs 3, and the bed 2 may be of any desired length. An improved spinning headstock 4 is adjustably mounted in a well-known manner at a desired longitudinal location upon the bed 2, and an improved tailstock 5 is likewise adjustably mounted upon the bed in a wellknown manner lat -a desired longitudinal location adjacent the headstock.

Between the headstock and thetailstock a longitudinal feed carriage 6 is mounted in a well-known manner for longitudinal movement between the headstock and the tailstock by rotation of the longitudinal feed carriage control wheel 7. A cross feed carriage 8 is mounted upon the longitudinal feed carriage '6 for cross movement in a well-known man `ner by operation of the cross feed carriage crank 9 and the turret tool holder 10 is mounted on the cross feed carriage 8.

For resisting both thrust and radial loads, the improved headstock 4 is provided at its `ends with roller bearings 11 and 11 removspindle drive shaft 15 is journalled in theI spaced bearings 11 and 11 and has keyed v thereon between the bearings a drive pulley 16 for operative connection as by a belt, not shown, with a power shaft. At the spinning end 17 of the headstock the spindle shaft 15, which is preferably tubular, is provided with an inner taper 18 for receiving rand litting with the tapered end 19 of the improved spinning arbor 20.

The improved spinning arbor 20 includes, axial with the tapered end 19, a cylindric sleeve bearing 21 preferably having an outwardly extending stop flange 22 adjacent the tapered end 19.- The sleeve bearing is preferably provided with a form ring beafring outer end 23 having a diameter less than the diameter of the body of the sleeve bearing21; Upon the form ring bearing 23 a form ring 24 -preferably made of hardened tool steel'is secured, and the outer periphery of the ring 24 extends beyond the outer periphery of .the sleeve bearing 21, thereby providing an outer sleeve stop 25.V

A spinning formv and thrust sleeve 26. is slidably mounted on the sleeve bearing 21 and the form ring 24, and is provided with an inwardly projecting sleeve flange 28 for abutting against the sleeve stop flange 22 of the sleeve bearing 21 and the forward stop 25'of the formrlngor die 24. The sleeve 26 is provided With an annular groove 29 for receiving a sleeve sliding linger 30 secured in the end of a lever 31 pivotallv mounted at the spinning end of the head'- stock for selective engagement of the finger 30i withy the sleeve groove 29 to slide the sleeve upon the sleeve bearing and form ring as defsired while the arbor is being conf tinuously rotated.

At the flange end of the sleeve 26, a cetrif- `ugally operated dog 32 is pivotally secured to the sleeve as by a screw 33, the axis of the pivotal mounting being located away from the center of gravity of thedog, so that one end of the dog will fly outwardv upon rotation of the sleeve, and the other end will extend inward for entering an annular groove' 34 in the sleeve bearing 21, so spaced that when the dog end is in the groove, the outer end 35 of the sleeve will be maintained in a desired relationship with the outer end '36 of the form ring or die. The sleeve bearing is also preferably provided with a pilot pin '37 axial therewith and having a tapered end removably secured in the outer end of the sleeve bearing, and the pin extendingy outward therefrom 'for purposes hereinafter to be set forth in.

detail.

For clampingj material to be spun against the outer end of the arbor 20, and for applying a preferably yielding axially directed thrust upon the material to be spun upon the arbor, the improved tailstock 5 is provided with alongitudinal aperture 38y axial with the arbor and spindle shaft, and in which aperture piston iod 39 is slidably mounted, and the piston rod is provided at its outer end with a piston 40,- preferably operatively mounted in a cylinder 41 ,for yielding actuation in a usual manner by means of a compressible medium as air and the like, admitted to the cylinder through a supply line` 42, having a control valve 43 therein and conveniently mounted upon the tailstock, whereby air may be admitted to the cylinder to move the piston rod longitudinally towards or away fro'm the arbor.

Upon its end adjacent the headstock, the

piston rod 39 is provided with a form and l thrust head or die 44 preferably mounted upon the rod b meansof a bearing 45 of a ball or ro ler type, adapted for receiving 'radial and thrust loads.

-In the thrust head-or die 44 and the rod y 39 an axial aperture. 46 1s providedfor receiving the pilot pin 37 extending outwardly from the arbor 20, as aforesaid.

The turret tool holder 10, mounted upon the cross feed carriage 8, is provided with la plurality of rotary spinning tools47 and 48 mounted on ball or roller bearings, and adapted for selective operation by rotation of the turret head of the tool holder by means 'ofa'suitable turret handle 49.

The improved metal spinning apparatus thus described in detail, may be used for carrying out my improved methods for com- .pletely spinning, finishing, andv substantially dynamically balancing a' V pulley or the like, during a continuous rotation of the spinning arbor of the improved ap paratus, and which is the subject matter of .my aforesaid 4prior application, Serial` A blank pulley disk 50 is provided with a central aperture 51 for fitting upon the pilot pin 37 extending outwardly from the arbor 20.

'As illustrated in Fig-2, the disk 50'is securely clamped against the outerA end of the arbor by admitting air to the cylinder 41 to advance the piston rod longitudinally;

the arbor axis. The first spinning tool 47v has ypreferably a wedge shaped outer peripher having a relatively blunt 'and curve apex for the wedge, as shown.

The spindle shaft is then continuously rotated preferably at a. speed of 1500 to 1800 R; Pv. M., and the sleeve 26 having been retracted against the sleeve stock flange 22, by operation of. the lever 31, and the outer surface ofthe disk having been preferably coated with a film of oil, having a suiiicietly heavy body to remain on the disk during its rotation without being thrown therefrom by centrifugal force, and with the first spinning tool 47 angled asaforesaid, the operator turns the longitudinal feed carriage Vcontrolc wheel 7 and the cross feed carriage crank 9 to longitudinally and transversely bring the rotaryv spinning tool 47 into contact with the `blank disk and spin the same down as to the form illustratedin dotted lines at 52 in Fig. 2, which is the same form illustrated in full lines in Fig. 3.

The air valve 43 and the lever 31 are then operated lto slide the sleeve 26 towards the tailstopk, wherebyy the continuously rotating, parti-all formed blank 52 is longitudinally posit1oned as indicated in Fig. 3, the centrifugally loperated dog 32 lockingl thesleeve `26 in the desired position.

Air is then admitted to the cylinder 41 to advance the thrust head or die 44 towards r the arbor, whereby the partially formed blank 52 is subject to, a yielding axially directed thrust, causing the blank to assume lhe shape indicated in dotted lines at 53 in I The turret tool holder is then operated so' that. the axis of rotation of the4 tool 47 is set parallel with the arbor axis and with the thrust head still' exerting a yielding, axially directed thrust upon the partially formed blank 53, the longitudinal feed carriage control wheel 7 is then turned by the operator to apply a radial spinning pressure by means of the tool 47 to the tubular portion 53 ofthe partially formed blank 53, whereby the simultaneously. applied radial spinning pressure and, axially directed thrust upon the continuously rotat ing blank causes the same'to assume the` form illustrated in Fig. 4. 1

The first spinning tool 47 may then be Withdrawn and the finishing roller spinning tool 48 having the shape of the groove to be formed may then be applied in a similar manner to finally iinish, spin and vdynamically balance the V groove pulley 54, as illustrated in Fig. 5; during which operation the axially directed thrust pressure of the ring-or die 24 and the head or die 44, are applied'to the material` opposite the sides of the final groove forming roll 48. During the operation illustrated in Fig. 4, the sleeve 26 is locked inthe position advanced toward the tailstock, but during the operation illustrated in Fig. 5, the sleeve v 26 is retracted towards the headstock.

. 60, 61, 62, and 63, made by slightly modified forms-of spinning tools and arbors in thedspinning apparatus describ'edeas aforesai Pulleys 58,A 59, 61, 62 and 63 are illustrated as being provided respectivelyA with-suitablehubs 58', 59', 61', 62' and 63'. Two of the pulleys 61 are combined with the hub 61' to form a double V'groove pulley Wheel. Y Fig. 14 illustrates amodified form of thrust head, indicated generally at .44', adapted for minimizing friction losses, thereby reducing the diameter of the air cylinder required for advancing and retracting thethrust head.

The modiiied thrust head 44 includes a transversely extending bearing head 64 pinned to the end 39" of the piston rod 39 nearestjthe arbor 20. A transversely extending forming Wheel shaft 65 is mounted in the bearing head 64, and has journalled on each of its outer ends conical forming Wheels 66, for use in` a manner similar to the heretofore described method of using the thrust head 44.

I claim: v

1. Apparatus for rollerspinning. a sheet or metal strip pulley and the like to form a relatively narrow and relatively deep groove in a peripheral cylindric flange on an integral disk Wheel blank, includinga or metal strip pulley and lthe like to formi a relatively narrow and relatively deep groove in a peripheral cylindric iiange on an integral disk Wheel blank, including a spinning headstock With a form die thereon for one side of the groove iiange, a tailstock With a thrust head having a form die thereon for the other side of the ygroove iange, a spinning roller having the cross sectional shape of the groove to beformed, means forv moving the spinning roller radially of the cylindric flange to form the groove in the ii'ange, and yielding means moving the one die toward the other die to compress the sides of the groove against the spinning roller.

In testimony that I claim the above, I havehereunto subscribed my name.

REYNoLD e. NELSON. 

